Heavy metal mercapto sulphonic compounds



Patented June 28, 1927.

UNITED STATES PATENT OFFICE.

ADOLF FELDT, F BERLIN-WILMERSDORF, WALTER SCHOELLER, OF BERLIN-WESTEND,

AND ERICH BORGWARDT OF BERLIN, GERMANY, ASSIGNOBS TO CHEMISCHE FA'B- RIK AUF ACTIEN (VORM. E. SCHEBING), OF BERLIN, GERMANY.

HEAVY METAL MERCAIPTO SULPHONIC COMPOUNDS.

No Drawing. Application filed December 10, 1925, Serial No. 74,632, and in Germany December 15, 1924.

Our invention relates to new chemical products adapted for pharmaceutical 51186 and to the method of making same. It more particularly refers to the production of organic metallic mercapto, sulphomc compounds which correspond to the formula H r e-( 311) The invention is illustrated in the following examples, the parts being by weight I Example 1.

1 part of the potassium salt or mercaptobenzene-sulphonic acid (obtained from diazobenzene sulphonic acid and potassium sulphide, and reducing the disulphide obtained with aluminum amalgam to obtain a colourless crystalline powder easily soluble in water) is dissolved in 10 parts of water and a 10 percent solution of potassium aurobromide is added thereto until it no longer becomes de-coloured. On the addition of alcohol the potassium salt of paraauromercaptobenzenesulphonic, acid separates out in yellow flakes. The salt which has a gold content of about 45 percent is purified by repeated precipitations. It is easily soluble in water. The final product has the following formula All Example 2.

final product is colourless crystalline leaves difticultly soluble in water) are mixed with 4 parts of water and brought into solution as a sodium salt by the addition of caustic soda. An amount of sodium sulphite corresponding to 1 molecule is now added and while stirring there is added 400 parts of 10 percent potassium aurobromide solution whereby the acid is precipitated as a slightly yellowish body which is barely soluble in cold water. It is filtered off, dissolved in caustic soda and precipitated as sodium salt by the addition of alcohol. It is a colourless powder easily soluble in water and has a gold content of about 44 percent, and the following structural formula SOaNa SAu NH: Example 3.

2.4 parts of 1-mercaptonaphthalenei-sulphonic acid (see Berichte der deutschen chemischen Gesellschaft, vol. 32, age 1152) are dissolved in 5 percent hydroc iloric acid whereupon a solution of 1.5 parts of aurichloride in 15 percent of water is slowly added. The auromercaptonaphthalcne sulphonic acid precipitated is well washed with water and alcohol; it forms when dissolved in caustic soda and precipitated with alcohol a light yellow powder very easily soluble in water which has a gold content of about 41 percent. The structural formula of the SAu O;Na Example 4.

To 15 parts sodium gamma-thioglycerinealpha-sulphonate (obtained from sodium gamma chloroglycerine alpha sulphonate and sodium sulphhydrate) dissolved in 500 parts of water is added a solution of 8 parts of aurichloride and 70 parts of water. The

gold compound is precipitated by the addition of 600 parts of alcohol as a nearly colourless powder easily soluble in water; the compound is purified by repeated precipitations. It has a gold content of about 49 percent. and the following formula vAuSQH CHOBLCH S0,,Na Example 5.

1 mol. sodium methanthioldisulphonate (see Annalen der Ghemie, vol.'161, page 134) is dissolved in a little water and a 10 percent solution of mol. of potassium auro bromide is slowly added. On the addition of the like volume of alcohol to the nearly colourless solution the auromercaptometn anedisulphonate of sodium is precipitated; this, after re-precipitation from water by alcohol, is easily obtained in a pure and white condition. The gold content of the compound, which crystallizes with 2 mol. Ag, is about 41.5 percent, and the compound has the following formula CH. (SAu) (SO Na) 2 Example 6.

Ortho-amino-para-sulphophenol. is treated with potassium sulpho cyanide and so much water that it enters into solution by warming; the solution is evaporated to dryness. The mass is then carefully heated to about 150 C. whereupon, with the splitting off of ammonia and sulphuretted hydrogen, a ring formation to the potassium Q-mercaptooxa- C-SAu K0; /7

Example '7.

2 parts of 4-amino-2-mercaptobenzene-1- sulphonic acid are dissolved as the sodium salt in 10 parts of water and then treated with 17 parts of .a 10 percent solution of silver nitrate. The light yellow acid precipitated is filtered 0E, dissolved in caustic soda and precipitatedwith alcohol as the sodium 4-amino-Q-argentomercaptobenzenel-sulphonate. The silver content is about 31 percent, and the structural formula as follows SOaNfl SAg H: Example 8.

2 parts of sodium 4-amino-2-mercaptobenzene-l-sulphonate dissolved in 10 parts of water are treated with 1.3 parts of mercuric chloride in 20 parts of water. The precipitated colourless acid is filtered ofi', dissolved in caustic soda and precipitated with alcohol as the sodium salt of l-amino-Q-mercuricmercaptobenzene-l-sulphonic acid having a mercury content of about 29 percent. The final product has either of the following formules:-

S0;Na som S-Hg-S 0t IGQH" (NH!) (SOgNB) 3]: Hg

Example 9.

5 parts of sodium 4-amino-2-mercaptobenzene-l-sulphonate in 45 parts of water are treated with the calculated quantity of a solution of bismuth trichloride which is diluted with some acetic acid whereby the bismuth compound which corresponds to the for mula (C H NH SO HS) Bi precipitates as an orange yellow powder. The sodium salt of this compound is produced by dissolving in caustic soda and precipitatin with alcohol. It is an orange yellow pow er easily soluble in water and having abismuth content of about 22 percent.

Example 10.

3 parts of iminomenthylene sodium sulphite-2-mercaptobenzene-l-sulphonic acid are dissolved in caustic soda and 30 parts of a ten percent solution of potassium aurobromide are added. The formed gold compound is sucked ofi', washed with water and transformed into the sodium salt by dissolving in caustic soda and preci itating with alcohol. It is a powder easi y soluble in water and having a gold content of about 35 percent, and the following structural formula SO Na SAu - N-CHpSmNa a The sodium salt may also be obtained by causing formaldehyde sodium bisulphite to react upon the sodium salt of 4-amino-2- mercaptoaurobenzene-l-sulphonic acid. described in exam le 2.

Other metallic compounds can be obtained in a similar manner 10 use of corresponding metallic salts. T e process is generally ap licable to mercapto organic compounds w ich contain sulphonic acid in the molecule.

We wish it to be understood that the production of the new compounds is not limited to the exact roportions and operations described, for o vious modifications will occur to aperson skilled in the art.

We claim 1. As new products organic metallic mercapto sulphonic compounds, corresponding to the formula wherein a: is an ali hatic, or aromatic or heterocychc radical, e a heav metal, and

3 either H or a metal, prefera ly an alkali v or alkali earth metal.

2.--As a new product 4-amino-2-merca toaurobenzene-l-sulphonic acid, correspon ing to the formula soar being a colourless powder easily soluble in water and having a gold content of about 44 per cent.

3. As a new product the disodium salt of -iminomethylene sulphurous acid-2-mer-- S-Au being easily soluble in water and having a gold content of about 35 percent.

4. The process which consists in causing a heavy metal salt to react upon a mercapto sulphonic acid compound.

5. The process which consists in causing a "gold salt to react upon a mercapto sulphonic acid compound.

6. The process which consists in causing potassium aurobromide to react upon the sodium salt of 4-amino-2-mercaptobenzenel-sul honic acid.

7. e process which consists in causing potassium aurobromide to react u on the sodium salt of 4-amino-2-mercapto enzenelislulphonic acid in presence of sodium sulte. r P 8. The process which consists in causing otassium aurobromide to react upon 4- lminomethylene sodium sulphite Q-merca tobenzene-l-sulphonic acid, dissolvin t e formed compound in caustic soda an preci itating with alcohol.

tures.

, ADOLF FELDT.

WALTER SCHOELLER. ERICH BORGWARDT.

n testlmony whereof we afiix our signa-' 

